Hired-Hand System 100 Variable Speed Controller - Manual (Page 6)

System 100 Variable Speed Controller
4801-2974 December 21, 1995
4
Program A
Program A is used for tight control of temperatures in the house. Remember, all stages work from
target temperature:
Target Temp 74F
Variable Span 2F
Using these presets, the variable speed fan will run at max. speed at 76F. If temperature should still
rise, Cool stage 1 will engage at 77F. If temperature still rises, Cool Stage 2 would engage at 79F.
As the House cools, Cool stage 2 would shut off at 78F, Cool stage 1 will shut off at 76F. If
Temperature drops below target temperature, the heat stage will turn on at 72F, and shut off at 73F.
Program B
Program B is used for tight control of temperatures in the house. Remember, all stages work from
target temperature:
Target Temp 74F
Variable Span 2F
Using these presets, the variable speed fan will run at max. speed at 76F. If temperature should still
rise, Cool stage 1 will engage at 78F. If temperature still rises, Cool Stage 2 would engage at 80F.
As the House cools, Cool stage 2 would shut off at 79F, Cool stage 1 will shut off at 77F. If
temperature drops below target temperature, the heat stage will turn on at 71F, and shut off at 73F.
Calibration of Target Temperature
If the controller does not seem to be operating at the correct temperatures, you may need to calibrate
the target temperature knob. For this you will need an Allen wrench.
Turn the knob until the words “VAR FAN” are flashing. Then slowly turn the knob counter clockwise
until the words stop flashing. This position is the actual temperature position. Loosen the Allen screw
in the knob, then remove the knob. Look at a reliable thermometer near the sensor, and replace the
knob with the white dot aligned with the correct temperature. Tighten Allen screw, and reset target
temperature.
Wiring Specifications
Warning:
Warning:
Do not connect more than six amps of load to any one stage. The Variable Speed
Circuit will carry up to ten amps.